Hall, Gillian C.a,*; Carroll, Dawnb; Parry, Davidb; McQuay, Henry J.c
aGrimsdyke House, London, UK
bOutcomes Research and Evidence Based Medicine, Pfizer Ltd, UK
cUniversity of Oxford Pain Relief Unit, Oxford OX3 7LJ, UK
*Corresponding author. Tel.: +44 0 20 8441 8421; fax: +44 0 20 8441 8421.
E-mail address:[email protected]
Received March 10, 2005; received in revised form December 23, 2005; accepted January 26, 2006.